Process of treating fish-flesh.



, lution pre ared No Drawing.

- KARL SGHWICKEMTH, OF BONN, GERMANY To all whom 'it may. concern:

Be it known that I, KARL SCHWICKERATH, a subject of the German Em eror, and resident of Bonn, Germany, ha e invented certain new and useful Im rovements in Processes of Treating Fishlesh, of which the following is a specification.

In my prior patent, Number 860,814,

dated July 16, 1907, I have described a rocess of freeing from fishy taste'and'smell, by means of perman anate salts, a proteose so- Irom fish albumen.- Such process di ers from the present process in that the destruction and removal of the badsmelling compounds are efiected primarily by the addition of hydrated lime or other i solution of an alkaline earth to the proteose solution.

In the present process, the fish flesh is treated, as in the earlier process, with super-.

heated steam,-to obtain the proteose solution.

To this solution the hydrated lime, in the form of lime water, or dilute milk of lime, is added, whereupon the solution becomes cloudy. Upon the application of heat thereto a flocculent precipitate separates out, which precipitate may be readily filtered ofi, the

' residue on the filterpossessing an offensive fishy smell. The clear filtrate is then eva 0- rated and dried. The addition of the drated lime, to the proteose solutionmay the further addition of the lime and subsequent heating will cause no further precipitation.

The following maybe given as an exam- Specification of Letters Iatent.

Application filed-December 16, 1907. Serial No. 406,729.

matter.

is continued until it -1s determined from ex-- amination ofa sample of the filtrate that.

PROCESS OF TREATING FISH-FLESH.

Patented Apr. 5, 1910.

file of the processz-50 kilograms of fish esh are treated in an autoclave with superheated steam at a temperature of frompl20 to 130 cent ilgrade, for a period of about two hours.

he liquid portion ofthe' contents is then separated off from the solid To the liquid thus obtained are added 150 grams of calcium hydroxid in the form of milk of lime. The mass is then heated to about 70 to 80 centigrade, or until a flocculent precipitate separates out.

The-1i uid is then 'filtered, and the clear filtrate t en evaporated and dried.

I claim as my invention 1. A rocess of removing t 1e fishy taste and sme 1 from a proteose solution prepared i from fish flesh, consistingin adding to such solution a solution of an alkalme earth, heatin the resultant solution, filteringsaid resu tant solution, and evaporating and drying the clear filtrate. I

2. A- rocess of making aproteose prepa ration om fish which conslsts in. treating fish flesh with superheated steam-to obtain a proteose solution, treatin such solution with milk of lime, heating t e resultant so-,-

rates out, filterin the liquld, and evaporatin and drying t eclearfiltrate.

A n testimony whereof I have hereunto. set' my hand inthe presence of two subscribing wltnesses.

' KARL SCHWICKERATH.

Witnesses:

PAUL HUNGER, GUSTAV Vossnn.

'lution until a flocculent precipitate se'pa-- 

